Clean Water Act discharge permit · NPDES IL0022446
SENECA WASTEWATER TREATMENT PLANT, Seneca, IL: NPDES IL0022446 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
SENECA WASTEWATER TREATMENT PLANT, held by SENECA, VILLAGE OF, holds NPDES permit IL0022446, which discharges to Illinois River. EPA’s file records it issued May 10, 2018 and expiring May 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SENECA WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | SENECA, VILLAGE OF |
| NPDES ID | IL0022446 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 10, 2018 |
| Expiration date | May 31, 2023 |
| Address | Seneca, IL 61360 |
| Receiving water | ILLINOIS RIVER |
| Subwatershed | Armstrong Run-Illinois River (HUC 071200050801) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 10Under a numeric limit
- 10With a violation of any kind
- 3With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Coliform, fecal general | 3 | 35 | 34 | September 30, 2025 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 10 | 6 | February 28, 2018 | 80% over the limit |
| Solids, total suspended | 9 | 8 | 2 | December 31, 2025 | 7% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 8 | 0 | ||
| pH | 4 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 4 | 0 | ||
| Chlorine, total residual | 2 | 3 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 2 | 0 | ||
| Flow, total | 2 | 1 | 0 | ||
| Flow | 1 | 1 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0022446.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IL0022446.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IL0022446 there.
Nearby on the register
- Discharge permits in Seneca
- Every permit record in Seneca, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.